Finding the Fourth Proportional to 13,315.56, 19,973.28 and 4,081.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,315.56 : 19,973.28 = 4,081.56 : x
2. Step 2: Convert to fraction form
   13,315.56/19,973.28 = 4,081.56/x
3. Step 3: Cross multiply
   13,315.56x = 19,973.28 × 4,081.56
4. Step 4: Simplify right side
   13,315.56x = 81,522,140.72
5. Step 5: Solve for x
   x = 81,522,140.72/13,315.56
6. Step 6: Final answer
   x = 6,122.32